Double Layer at the Pt(111)–Aqueous Electrolyte Interface: Potential of Zero Charge and Anomalous Gouy–Chapman Screening
| Autor: | Nakkiran Arulmozhi, Kasinath Ojha, Marc T. M. Koper, Diana Aranzales |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Metal–Electrolyte Interface Double-layer capacitance chemistry.chemical_element Thermodynamics Aqueous electrolyte Electrolyte 010402 general chemistry Electrochemistry Gouy–Chapman capacitance 01 natural sciences Capacitance Catalysis double layer capacitance Perchlorate chemistry.chemical_compound Pt(111) 010405 organic chemistry Communication General Chemistry General Medicine Communications 0104 chemical sciences Condensed Matter::Soft Condensed Matter chemistry potential of zero charge Platinum |
| Zdroj: | Angewandte Chemie International Edition, 59(2), 711-715 Angewandte Chemie International Edition Angewandte Chemie (International Ed. in English) |
| ISSN: | 1521-3757 0044-8249 |
| DOI: | 10.1002/ange.201911929 |
| Popis: | We report, for the first time, the observation of a Gouy–Chapman capacitance minimum at the potential of zero charge of the Pt(111)‐aqueous perchlorate electrolyte interface. The potential of zero charge of 0.3 V vs. NHE agrees very well with earlier values obtained by different methods. The observation of the potential of zero charge of this interface requires a specific pH (pH 4) and anomalously low electrolyte concentrations ( A Gouy–Chapman capacitance minimum at the potential of zero charge of the Pt(111)‐aqueous perchlorate electrolyte interface is reported. Compared to the gold and mercury double‐layer data, the diffuse double layer structure at the Pt(111)‐electrolyte interface deviates significantly from the Gouy–Chapman theory in the sense that the electrostatic screening is much better than predicted by purely electrostatic mean‐field Poisson–Boltzmann theory. |
| Databáze: | OpenAIRE |
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